T-shaped groove tray tool set for improving appearance and thickness level of lying spraying bolt

Abstract

The invention provides a T-shaped groove tray tool set for improving appearance and thickness level of a lying spraying bolt, which is used in a lying spraying process of simultaneously realizing coating thickness of 5-13 [mu] m on a bearing surface and a non-bearing surface of the bolt, and comprises a shielding tool and a tray, a to-be-sprayed bolt is fixed in a T-shaped groove of the tray, and the T-shaped groove tray tool set is arranged in the T-shaped groove of the tray. And the shielding tool is fixed in the fixed notch of the tray. According to the T-shaped groove tray tool set for improving the appearance and thickness level of the lying spraying bolt, T-shaped grooving is adopted, the grooving area is increased, the weight of a plate body is reduced, a 3mm stainless steel plate is adopted as a tray base material, the problem that an aluminum alloy tray is prone to deformation and bending after being cured and heated is solved, meanwhile, acid-base groove stripping can be achieved through the stainless steel tray, and the service life of the tray is prolonged. And the tray can be repeatedly used after the coating on the surface of the tray is removed.

Description

Technical Field

[0001] The present invention belongs to the field of surface treatment, and particularly relates to a T-slot tray tooling set for improving the appearance and thickness level of horizontally sprayed bolts. Background Art

[0002] At present, bolt spraying technologies mainly include vertical spraying, horizontal spraying, and stir-frying spraying, etc. The horizontal spraying technology is mainly used for horizontally spraying longer workpieces (total length ≥ 30 mm). After one side is sprayed, it is flipped to spray the other side. This technology can well avoid the problem that bolts are prone to unstable standing due to their excessive length. However, the existing conventional straight-through hole trays have obvious deficiencies for spraying longer bolts using the horizontal spraying technology: on the one hand, during the spraying process, since the product is in a state without fixed-point restrictions, it will roll irregularly under the influence of paint mist impact. In addition, when the tray rotates or moves, the bolts are also prone to slip due to shock, and then large-area spraying dead spots appear, directly affecting the appearance quality of the product and the coating uniformity; on the other hand, the horizontal spraying technology is widely used for bolts with relatively high requirements for the coating thickness of each part (5 - 13 μm). This is because this technology can adjust the spraying angle by rotating the tray to make up for the deficiency that other methods cannot spray the thread bearing surface. This technology can achieve a coating thickness of 5 - 13 μm on both the bolt bearing surface and the non-bearing surface at the same time. However, in this method, the rod part and the thread part are covered with paint simultaneously during spraying, so the thickness of the bolt rod part cannot be accurately controlled. When the coating thickness of the thread part is qualified, the size of the rod part often exceeds the tolerance. Summary of the Invention

[0003] In view of this, the present invention aims to provide a T-slot tray tooling set for improving the appearance and thickness level of horizontally sprayed bolts, so as to solve the problems that in the conventional straight-through hole tray, due to the product being in a state without fixed-point restrictions, it will roll irregularly under the influence of paint mist impact, and when the tray rotates or moves, the bolts are also prone to slip due to shock, and then large-area spraying dead spots appear, directly affecting the appearance quality of the product and the coating uniformity, and in the horizontal spraying technology, the rod part and the thread part are covered with paint simultaneously during spraying, so the thickness of the bolt rod part cannot be accurately controlled.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] The present invention provides a T-slot tray tooling set for improving the appearance and thickness level of horizontally sprayed bolts. The T-slot tray tooling set is used in the horizontal spraying process for simultaneously achieving a coating thickness of 5 - 13 μm on the bolt bearing surface and the non-bearing surface, and includes a masking tooling and a tray. The bolt to be sprayed is fixed in the T-slot of the tray, and the masking tooling is fixed in the fixed slot of the tray.

[0006] Further, the tray includes fixing notches and T-shaped grooves. The upper part of the tray is provided with a fixing plate, and rectangular columns are fixed at the four corners. The fixing plate is symmetrically provided with two fixing notches along its vertical center line. At least two rows of several T-shaped grooves are arranged on the tray along the length and width directions of the tray. The groove spacing between two adjacent T-shaped grooves in any row is the same, and the longitudinal spacing between any two adjacent rows of T-shaped grooves is the same. The longitudinal center line spacing between two adjacent T-shaped grooves in the first row is the first groove spacing, and the longitudinal center line of the first T-shaped groove in the second row is located at the central position between the first T-shaped groove and the second T-shaped groove in the first row.

[0007] Further, the overall material of the tray is stainless steel with a thickness of 3 mm.

[0008] Further, the shielding tooling is set according to the number of rows of bolts to be sprayed placed along the length direction of the T-shaped grooves on the tray.

[0009] Further, both the left and right sides of the shielding tooling are right-angled trapezoidal mounting plates, which are fixed by a rectangular fixing plate between the two right-angled trapezoidal mounting plates. The straight waist of the right-angled trapezoidal mounting plate is fixed in the fixing notch. The inclined waists of the two right-angled trapezoidal mounting plates are inclined upward and are connected to the rectangular fixing plate. The rectangular fixing plate completely shields the rod part and the head of the bolt.

[0010] Further, the mating tolerance between the rod diameter of the T-shaped groove and the rod diameter of the bolt to be sprayed is (0, -0.1), and the T-shaped groove penetrates the fixing plate of the tray.

[0011] Compared with the prior art, the T-shaped groove tray tooling set for improving the appearance and thickness level of the lying spray bolt of the present invention has the following advantages:

[0012] (1) The T-shaped groove tray tooling set of the present invention uses T-shaped grooving, which increases the grooving area and reduces the weight of the plate body. A 3 mm stainless steel plate is used as the tray base material, which solves the problem that the aluminum alloy tray is prone to deformation and bending after curing and heating. At the same time, the stainless steel tray can be degaussed in acid and alkali tanks. After removing the coating on the tray surface, it can be reused, greatly extending the service life of the tray. The tray does not need to be fixed and is placed on the spraying table during spraying, and the spraying table can rotate.

[0013] (2) The T-shaped groove structure in the present invention mills out T-shaped grooves slightly smaller than the product size at the rod part according to the product specification dimensions, ensuring that the product can have multiple fixed-point contacts with the tooling plate and preventing it from sliding under the influence of paint mist pressure or vibration. The T-shaped groove is equipped with a special shielding tooling, which can cover the bare rod part when only spraying the thread, preventing its dimensional tolerance from exceeding the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions

[0015] It is used to explain the present invention and does not constitute an improper limitation to the present invention.

[0016] In the attached drawings:

[0017] Figure 1 It is a schematic diagram after assembly of the T-slot tray tooling group for improving the appearance and thickness level of the lying spray bolt according to the embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of bolt fixation of the T-slot tray tooling group for improving the appearance and thickness level of the lying spray bolt according to the embodiment of the present invention;

[0019] Figure 3 It is an axonometric schematic diagram of the shielding tooling of the T-slot tray tooling group for improving the appearance and thickness level of the lying spray bolt according to the embodiment of the present invention;

[0020] Figure 4 It is an axonometric schematic diagram of the tray in the T-slot tray tooling group for improving the appearance and thickness level of the lying spray bolt according to the embodiment of the present invention.

[0021] Explanation of reference numerals:

[0022] 1. Tray; 2. Shielding tooling; 3. Bolt; 4. Fixed notch; 5. T-slot; 6. Spray gun nozzle. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] Refer to Figures 1 - 4 As shown in Figure 1 、 Figure 2 In the middle, the spray gun nozzle 6 is sprayed at an angle of 45 - 60° with the horizontal direction. This embodiment provides a T-slot tray tooling group for improving the appearance and thickness level of the lying-sprayed bolts. The T-slot tray tooling group is used in the lying-spraying process for simultaneously achieving a coating thickness of 5 - 13 μm on the bolt bearing surface and non-bearing surface, and includes a masking tooling 2 and a tray 1. The bolts to be sprayed are fixed in the T-slots 5 of the tray 1, and the masking tooling 2 is fixed in the fixed slot openings 4 of the tray 1.

[0028] Specifically, in this embodiment, the tray 1 includes fixed slot openings 4 and T-slots 5. The upper part of the tray 1 is provided with a fixed plate and rectangular columns are fixed at the four corners. The fixed plate is symmetrically provided with two fixed slot openings 4 along its vertical center line. The tray 1 is provided with at least two rows of a plurality of T-slots 5 arranged along the width direction of the length of the tray 1. The slot spacing between two adjacent T-shaped slots in any row is the same, and the longitudinal spacing between any two adjacent rows of T-shaped slots is the same; the longitudinal center line spacing between two adjacent T-shaped slots in the first row is the first slot spacing, and the longitudinal center line of the first T-shaped slot in the second row is located at the central position between the first T-shaped slot and the second T-shaped slot in the first row.

[0029] Specifically, in this embodiment, the overall material of the tray is stainless steel with a thickness of 3 mm. The old tooling uses a 5-mm aluminum alloy plate as the tray base material. The new tooling uses T-shaped slotting to increase the slotting area and reduce the weight of the plate body, and uses a 3-mm stainless steel plate as the tray base material, which solves the problem that the aluminum alloy tray is prone to deformation and bending after curing and heating. At the same time, the stainless steel tray can be degaussed in an acid-base tank. After removing the coating on the tray surface, it can be reused, greatly extending the service life of the tray. The tray does not need to be fixed and is placed on the spraying table during spraying, and the spraying table can rotate.

[0030] Specifically, in this embodiment, the masking tooling 2 is set according to the number of rows of bolts to be sprayed placed along the length direction of the tray in the T-slots 5.

[0031] Specifically, in this embodiment, both the left and right sides of the shielding tooling 2 are right trapezoidal mounting plates, which are fixed to each other by a rectangular fixing plate. The straight waist of the right trapezoidal mounting plate is fixed in the fixing notch 4. The oblique waists of the two right trapezoidal mounting plates slope upward and are connected to the rectangular fixing plate. The rectangular fixing plate completely shields the rod part and the head of the bolt. A special shielding tooling matching the T-slot is designed to cover the bare rod part when only spraying the thread, preventing its dimensional tolerance.

[0032] Specifically, in this embodiment, the mating tolerance between the rod diameter of the T-slot 5 and the rod diameter of the bolt to be sprayed is (0, -0.1), and the T-slot penetrates through the fixing plate of the tray 1. The T-slot structure is adopted. According to the product specification dimensions, a T-slot slightly smaller than the product size is milled at the rod part to ensure that the product can have multiple fixed-point contacts with the tooling plate, preventing it from sliding due to the influence of paint mist pressure or vibration.

[0033] The specific process steps are as follows: 1. Select a suitable T-slot tray according to the bolt specification dimensions, place the bolt in the T-slot, and place the shielding tooling in the two deep grooves on both sides to ensure that the tooling just completely covers the rod part and the head of the bolt, only exposing the threaded part. Spray at an angle of 45 - 60° with the horizontal direction, the muzzle is 15 - 20 cm away from the bolt tail, the gun travel speed is 0.2 m / s, the liquid output is 0.5 g / s, and spray two circles (the tray rotates 720°).

[0034] 2. Remove the shielding tooling and perform integral spraying on the bolt. Spray at an angle of 45 - 60° with the horizontal direction, the muzzle is 15 - 20 cm away from the bolt tail, the gun travel speed is 0.2 m / s, the liquid output is 0.5 g / s, and spray two circles (the tray rotates 720°).

[0035] 3. Place it in an oven at 150 °C for pre-curing for 0.5 hours.

[0036] 4. Turn it over so that the side that was not sprayed under the slot originally faces up. When turning it over, ensure that the sprayed edge is aligned with the edge of the T-slot to prevent secondary spraying.

[0037] 5. Re-process the other side according to steps 1 and 2. After processing is completed, place it in the oven and cure it at 210 °C for 2 hours to complete the spraying process.

[0038] The segmented lying spray process, that is, placing bolts → placing masking tooling → spraying threads → removing masking tooling → spraying the whole → pre-curing → turning over → placing masking tooling → spraying threads → removing masking tooling → spraying the whole → curing. This process can achieve spraying only the threads in the first step, increasing the coating thickness at the thread part, and the rod part will not come into contact with the paint. Subsequently, after removing the tooling, the bolt is spray-coated integrally. The thread part has reached the qualified level during the first spraying, so only the rod part needs to be qualified during the second spraying. This method can achieve qualified coating thickness at multiple parts such as threads and rod parts at the same time.

[0039] For the method of removing the coating to extend its service life, the stainless steel tray can be first immersed in a strong alkaline solution to loosen the coating, then washed with water and placed in a stripping solution prepared by mixing sulfuric acid (specific gravity 1.84 g / mL) and nitric acid (specific gravity 1.42 g / mL) in a mass ratio of 8:2 to achieve the purpose of quickly removing the coating.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A T-slot tray tooling set for improving the appearance and thickness level of lying spray bolts, characterized in that, The T-slot tray tooling set is used in the lying spray process to achieve a coating thickness of 5 - 13 μm on both the bolt bearing surface and non-bearing surface. It includes a masking tooling and a tray. The bolts to be sprayed are fixed in the T-slots of the tray, and the masking tooling is fixed in the fixed slot openings of the tray.

2. The T-slot tray tooling set for improving the appearance and thickness level of the lifting and lying spray bolts according to claim 1, characterized in that The tray includes fixed slot openings and T-slots. The upper part of the tray is provided with a fixed plate, and rectangular columns are fixed at the four corners. The fixed plate is symmetrically provided with two fixed slot openings along its vertical center line. The tray is provided with at least two rows of several T-slots arranged along the length and width directions of the tray. The slot spacing between two adjacent T-slots in any row is the same, and the longitudinal spacing between any two adjacent rows of T-slots is the same; the longitudinal center line spacing between two adjacent T-slots in the first row is the first slot spacing, and the longitudinal center line of the first T-slot in the second row is located at the central position between the first and second T-slots in the first row.

3. The T-slot tray tooling set for improving the appearance and thickness level of the lifting and lying spray bolts according to claim 2, wherein The overall material of the tray is stainless steel with a thickness of 3 mm.

4. The T-slot tray tooling set for improving the appearance and thickness level of the lifting and lying spray bolts according to claim 2, wherein The masking tooling is set according to the number of rows of bolts to be sprayed placed along the length direction of the tray in the T-slots.

5. The T-slot tray tooling group for improving the appearance and thickness level of the lifting and reclining spray bolts according to claim 4, characterized in that, Both the left and right sides of the masking tooling are right-angled trapezoidal mounting plates. The two right-angled trapezoidal mounting plates are fixed by a rectangular fixing plate. The vertical waist of the right-angled trapezoidal mounting plate is fixed in the fixed slot opening. The inclined waists of the two right-angled trapezoidal mounting plates are inclined upward and are connected to the rectangular fixing plate. The rectangular fixing plate completely masks the rod part and the head of the bolt.

6. The T-slot tray tooling set for improving the appearance and thickness level of the lifting and lying spray bolts according to claim 2, wherein The mating tolerance between the rod diameter of the T-slot and the rod diameter of the bolt to be sprayed is (0, -0.1), and the T-slot penetrates the fixed plate of the tray.

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